Mari
There is no way to answer this as it will be dependant on the wording of the Descriptor in question, although as a general comment, having more need will not reduce the points you get.
A good example, are the two mobility Descriptors; the Moving Around Descriptor is severity based, the worse you are (the less you can walk) the more points you get, the Going Out Descriptor is functionally based, planning a route, following a familiar route and following an unfamiliar route, in this case it does not matter how bad your route planning is you can only score a certain number of points for it.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
